Foldable stool



FIG. 1 is a front elevational view of a foldable stool according to my new design, wherein the rear elevational view is a mirror image thereof;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevational view thereof, wherein the left side elevational view is a mirror image thereof;

FIG. 5 is a top, front and right side perspective view thereof; and,

FIG. 6 is a bottom, front and right side perspective view thereof. 

The ornamental design for a foldable stool, as shown and described. 